Administrator of



2 Sheets-Sheet 1.

(No Model.)

G. SHOLL, Deod., J. W. MARSHALL, Administrator. ORE STAMP. No. 318,193. Patented May 19, 1885.

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G. SHOLL, Deod.,

J; W. MARSHALL, Administratol. ORE STAMP.

No. 318,193'. Patented May 19, 1885.

I, UNITED STATS PATENT OFFICE.,

JOHN IV. MARSHALL, OF STAMFORD, CONNECTICUT, ADMINISTRATOR OF- CHARLES SHOLL, DEOEASED.

lonli-STAM P.

SPECIFICATION forming part ofLetters Patent No. 318,193, dated May 19, 1885. APPHCHUOH filed Merch 17,1885. (No model.) Patented in England July 13, 1875, No. 2,524, :ma september 7, iss, X0. 4,303.

To all whom t may concern:

Be it known that CHARLES SHoLL, deceased, late a subject of the Queen of England, and residing at Islington, in said country, did in his life-time invent certain new and useful Improvements in Ore-Stamps; and I do declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to that class of stamps or hammers in which there is interposed between the hammer or stamp and the power mechanism an air-chamber and a piston fitting therein. The piston and chamber are connected the one with the stamp and the other with the power mechanism, so that the stainp is operated by the latter through the medium of the air inthe chamber. The parts may be so arranged as to form two elastic air-cushions-one for the upward and one for .the downward motion ot' the stamp. It is also preferred to form the pneumatic chamber, which may bemost conveniently made cylin drical, with openings through which the air, or a portion of it, may gradually escape as the pistou moves toward one end or the other of the chamber. A spring may also be combined with the chamber and piston to maintain the latter normally at about the middle of the chamber. Tater-distributing devices may also be used to keep the pneumatic chamber from becoming too highly heated, and, in the case of stamps, to wash the crushed ore. In the case of stamps it is preferred to use a construction whereby the ore may be fed centrally through the pneumatic chamber and stamp to the parts by which it is crushed.

The invention can best be understood by reference to the accompanying` drawings, in which I have shown a means for carrying it into effect.

In said drawings, Figure lis a vertical central section of astainp-mill embodying theinvention. Fig. 2 is a section on line xx, Fig. 1. Fig. 3 is a horizontal section of the pneumatic cylinder and vits guides. Fig. 4 is a vertical central section of another form of the improved stamp-mill, with some of the parts shown in elevation; and Fig. 5 is a horizontal section of the pneumatic cylinder shown in Fie'. 4.

Iiike letters indicate corresponding paris throughout the drawings.

yA indicates the pneumatic cylinder, and B the stamp or hammer. These parts are preferablymade separately for convenience 1n transportation and iii supplying duplicates of these' parts of Athe apparatus; and the said parts are rigidly united by means of the anges a a and bolts a2, as shown in Fig. 1, or otherwise.` The cylinder A is, for the saine purpose, made in two parts, which areegual or nearly equal in length, and are rigidily connected by means of the anges b and suitable bolts, and the top or end of the cylinder is cast in one piece with the body thereof. Ihe saidy cylinder is also provided with a lining, A', composed of a metallic alloy, which will counteract the effect of the heat evolved by the constant compression of air in the cylinder by the reciprocating action of the piston. Thislining Ais sometimes made in two pieces, each provided with a flange, and the said anges are held between the Bauges b of the top and bottoni portions of the cyl1nder, as shown in Fig. 2. In other cases the said-l1ning is made in one piece, which is provided with a flange and isheld in place by a. cover, C, bolted to the cylinder A, as shown in Fig. 4. For this lining is used any metallic alloy which is durable and which will diminish the friction between the cylinder and piston, *and which is a bad conductor of heat. v

LThe cylinder and pistou may be combined with each other and connected with the power devices and stamp in a variety of dii'ferent ways. In the construction shown I make the cylinder with two longitudinal slots,l),throug-h which passes a transverse pin, E. Upon this pin is pivoted what is termed a plugl pneumatic piston, F, furnished with ringsf, of a inetallicalloy. This piston may be driven direct from a steam cylinder orfrom a crankthe npstroke of the piston the upperends of said slots will be closed thereby, and 'in' the downstroke of the piston the lower ends of said slots will be closed thereby, so that the air adA mitted above or belowthe piston will be compressed and act as a cushion.

The body of the cylinder A may be made in one piece, with a eoiv'ering-plate at one end, as shown in Fig. 4, or the upper end may be made solid, with the sides adjoining said end, and

the body of the chamber may be divided transversely through the slots, as shown in Figs. l, 2, and 3.' vThe latter construction possesses some advantages. ln such casethe two parts of the cylinder maybe made of `similar shape from one pattern, the slots may be more easily cast, leakage of air at the upper end between the plate shown in Fig. 4 and the body of the cylinder obviated, and the piston'and pins E may be cast in one piece, thus saving multiplicity of parts and iittings.

In addition to thelining A', there is provided the following means for keeping the cylinder A cool and for supplying water to meisten the ore or other material to be crushed-that is to say, a circular perforated pipe, l, is placed above the cup J at the vupper end ofthe coffer K. rlhis pipe is connected with a suitable water-suppl y. Two perforated branch pipes, l, extend from the pipe Land are arranged between recesses or grooves in the guides i and corresponding recesses or grooves in the exterior of the cylinder, as shown -in Figs. 2 and-3. By these means a constant streainot' cold water can be made to ilow over the outer surface of the pneumatic cylinder, and eventually escape into the coffer K, where the ore or vother material is crushed.

In Fig. 4 I have shown a Aform of the invention wherein the cylinder A and stamp B are made with a central tube, M, through which the ore can be Afed from a hopper, N, in such a manner that it falls through the center of an annularshoe, B, on the hammer or stamp B into the coffer K. Then the apparatus is thus constructed, the shoe B will wear more evenly or uniformly than those ordinarily employed, andthe crushed ore or other material Awill be equally distributed to the screens or grates.-

In the apparatus shown in Fig. 4 the cylinder and stamp are made in one piece, and an annular piston, F', must be employed, instead of a piston of the ordinary type. A spring or springs, L, acting between the pistonand one or both ends of the cylinder, serve'iofkcep the piston normally in the middle of the cylinder, and also supplement the action of the aircushiioln'.

' y, Instead of the crank H, a steam-cylinder of any desirable description may be used, the piston of which is connected in any suitable manner to the piston F. The piston is thus enabled to be reciprocatedby direct action, and. belts and a separate motorare dispensed with.

For the purpose of stamping-mills, however, the use ofthe crank-shaft H is attended with the advantage that a number of stamps or battery may be driven from a single shaft and motor, the shaft being provided with a corresponding number of cranks.

Having thus fully described the said invention and the manner of performing the same,

I wish it understood that although I have above referred particularly to a stamp-mill for crushing Aore, the saidinvention can be applied to hammers or stamp-mills for other purposes, and what is claimed is- ,1. The combination, with a stamp-head, a power mechanism, and a pneumatic chamber and piston connecting the same, of a watersupplying apparatus for cooling the chamber, consisting of a series of pipes arranged in proximity to the chamber and having jet or spray orices on their' inner faces, substantially as and for the purposes set forth.

` 2. The combination, with a stamp-head and a power mechanism, of a pneumatic chamber having ylongitudinal slots through the sides andbetween the ends thereof, a piston, and a rod attached to said piston through the slots, the chamber andxrod being connected with IOO said head and power mechanism, substantially as' and for the purposes set forth.

The combination, with a stamp-head and a power mechanism, of a pneumatic chamber having longitudinal slots through the sides and between the'ends thereof, a piston, and a rod attached to said piston through the slots, the chamber and rod being connected with said head and ypower mechanism, and the chamber being constructed in two parts, the dividing plane of. which passes through the slots, whereby the construction and assembling of the parts are facilitated, substantially as set forth.

V4. The combination of a stamp-head, a power mechanism, apneumatic chamber and piston connected the one with said head and the other positively with the power mechanism to be reciprocated thereby, and a spring acting between the piston and chamber to return said parts to a position-which will enable a pneumatic cushion to be formed on either side ofthe piston, substantially as and for the purposes described.

5. The combination of astamping-head and an opposing` block, a power mechanism, a pneumatic chamber and piston -between said mechanism and head for reciprocating the latter, ,and ,a hopper or conduit, said chamber and head being formed with a central feed- IIC AUI.

In testimony whereof I afx my signature in 1o the presence of two witnesses.

JOHN XV. MARSHALL, Admzv'nisti'cfor of the Estate of Charles Shall, dc-

ceased.

Witnesses:

ABRAM MARSHALL, XV. C. STROBRIDGE, Jr. 

